When some calls in AA picks up you dial an ext if they don't pick up and you 0 to transfer to the oper, if she doesn't pick up it just rings and rings her VM does not pick up. they would like this to go to a general mail box the general mail box owner is ext 100 that is the oper. but niether vm picks up ext 100 or the general mail box how do you set this to go to general mail box?